NBC announces its midseason lineup (Updated)

"Parenthood," starring an A-List ensemble that includes Peter Krause and Craig T. Nelson, will debut on March 1 at 9 p.m. Jerry Seinfeld's new comedy, "The Marriage Ref," will premiere on March 14 at 8 p.m.

[Update 11:50: We neglected to note that the "Heroes" season finale will air on Feb. 8 and the Winter Olympics will air on NBC from Feb. 12-28].